METHOD FOR EVALUATING THE SEDIMENTARY RATE CONTENT OF ORGANIC MATTER FROM DATA RECORDED IN WELLS BY DIAGRAPHY PROBES

摘要

Method for determining the content of sedimentary rocks in organic matter from data recorded in a well by at least two logging probes measuring different parameters. / P P The two probes are chosen one to respond in the same meaning to a variation of the water content and organic matter of rocks, the other to respond very differently to a variation of one or the other of these same constituents and, both so that the lines I of organic matter iso-content in a three-pole diagram, are substantially confused that the third pole is the PE water pole or the PA clay pole. The location of the line I 0% is experimentally determined and the organic matter content corresponding to each pair of values of the parameters measured in the well is deduced therefrom. In a diagram where the parameters used depend, for example, on the DELTAT transit time of the sound in the rock and the electrical resistivity Rt of the formations, the iso-content lines constitute a family of parallel lines. / P Application to the study of sedimentary basins.